CN1494320A - Television image related safety device - Google Patents
Television image related safety device Download PDFInfo
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- CN1494320A CN1494320A CNA02146362XA CN02146362A CN1494320A CN 1494320 A CN1494320 A CN 1494320A CN A02146362X A CNA02146362X A CN A02146362XA CN 02146362 A CN02146362 A CN 02146362A CN 1494320 A CN1494320 A CN 1494320A
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Abstract
The safety device is a device for monitoring TV signal capable of discovering whether TV content is distorted or not. At source of TV program, the device picks up features of image for each TV frame by using image related coding technique. Then, using field blanking times slot transfers image id code. At receiving end, features of image are picked up again for each TV frame to obtain image ID, which is compared with image ID obtaining from field blanking time slot. If both of image IDs are inconsistent, it indicates that content of TV image is changed. The monitoring system sends out alarming.
Description
The present invention relates to a kind of television image associated safety feature (Image Corelation SecuritySet) and be called for short the ICSS device.It belongs to the technical field of TV and computer.
The a recent period of time, international, domestic hostile force utilizes various high-tech means that our TV signal of transmission is stolen the beams and changed the pillars, and has arrived savage degree.From technical standpoint, how to take precautions against effectively, become the most important thing that radio and television safety is broadcasted task! At present, appear on the market at anti-technology and the product of substituting existing many families for another surreptitiously of TV signal.But fail safe that it is real and practicality constantly are being under suspicion.
In the market, the identification code of other technologies scheme the inside is all irrelevant with picture material, the identification code of each frame is a random number, but as long as legal TV programme is received, and from vertical blanking period (VBI), extract identification code and stick in the vertical blanking period of illegal TV signal illegal programs " is legalized ", therefore existing safe practice does not possess the ability of opposing bootlegging, is more elementary security monitoring mode.
Image model recognition technology that the objective of the invention is to utilize my company to have independent intellectual property right and corresponding dedicated IC chip product are monitored content of TV program.
Utilizing image recognition technology to extract the feature of every two field picture, is the key of dealing with problems.My company utilizes the image correlated characteristic extractive technique of up-to-date exploitation, the Characteristic Extraction of each frame television image is come out, this characteristic quantity generates video identification code through coding, it is minimum that the programme content of different TVs has the probability of identical video identification code, for example any two 1 second length the probability of television content with identical image identification code be 10
-50Front end utilizes the identification code of characteristics of image as this two field picture, insert (VBI) by field blanking and be sent to the rear end monitor, when deciphering, the rear end also the feature extraction of image to be come out, result who draws and the identification code among the VBI are relatively, if equate then be legal signal, as unequal then be illegal signals.
Feature of the present invention:
1. a television image associated safety feature is by the video extraction module, ICSS module and VBI processing module connect mutually and are installed in the module casket with the special circuit chip, it is characterized in that, the ICSS module is by main control singlechip (2), video sampling circuit (3), type filter circuit (4), video sound amplifying circuit (5), OK/field sync signal extraction circuit (6) formation, vision signal the need be amplified through unit 5, video letter through amplifying needs through ∏ type filter circuit (4), vision signal through filtering enters unit 6, extract row/field sync signal, enter video sampling circuit (3), obtain digitized video sampling signal; OK/and field sync signal and video sampling signal all import main control singlechip (2), and row/field under the video sampling signal is distinguished by row/field sync signal in unit 2, carries out a step and extracts image and levy, and generates video identification code.
2. the TV RF signals in the television image watch-dog enters radiofrequency signal splitter (11), divides two-way output, wherein one the tunnel enters tuner and passes through I
2The C bus is subjected to central controller (19) control, and television video frequency signal enters ICSS module (16) and vertical blanking period sign indicating number detecting circuit (15) respectively, and the ICSS module will produce and the video image identification sign indicating number.
TV signal maintenance device accompanying drawing of the present invention is as follows:
Fig. 1 is the television Signal Monitoring System block diagram
Fig. 2 is an ICSS modular circuit schematic diagram
Fig. 3 is an image recognition code generator block diagram
Fig. 4 is a TV signal monitoring circuit schematic diagram
Fig. 5, Fig. 6, Fig. 7 are TV signal monitor profile three-view diagram
Fig. 8 is a TV signal monitor stereogram
Below in conjunction with accompanying drawing the present invention is further illustrated:
Fig. 1 explanation: the legal TV programme of every suit are all passed through the image recognition code generator and are existed before broadcast Vertical blanking period inserts video identification code, and the channel that just is modulated onto separately of TV programme is transmitted then. Arbitrary node in the television signal transmission circuit can be by inserting the TV signal monitoring device with inspection Whether the TV signal of surveying in the transmission is legal program. The TV signal monitoring device not only can monitoring television The legitimacy of signal, and when the TV signal of finding certain channel is tampered to illegal programs, it Can disturb the TV signal of this channel, stop the user to receive illegal programs, simultaneously the TV letter Number monitor is reported to the police to supervision center.
Fig. 2 is each unit title and the effect in the ICSS modular circuit schematic diagram:
1, circuit is inserted in field blanking: effect is video identification code is inserted the vision signal field blanking Phase.
2, main control singlechip: effect is according to row/field sync signal, extracts video sampling signal In characteristics of image, and synthetic image identification code, its realization can be adopted the PIC16F73 chip.
3, video sampling circuit: effect is filtered video signal sampling, makes the simulation letter Number digitlization.
4, π type filter circuit: effect is to vision signal filtering the radio-frequency component in the filtering vision signal.
5, vision signal amplifying circuit: effect is vision signal is amplified, and makes signal strength signal intensity be convenient to digital sample.
6, going field sync signal extracts circuit: effect is to extract the row in the television video frequency signal
Synchronizing signal, its realization can be adopted the LM1881 chip.
Fig. 2 shows: the ICSS module is made of above Unit the 2nd, 3,4,5,6.Be characterised in that: vision signal needs to amplify through unit 5 earlier, is convenient to video sampling after this; Need pass through π type filter circuit (unit 4) through the vision signal of amplifying, filtering video medium-high frequency composition (wherein may comprise some noise signals) helps stably extracting characteristics of image; Vision signal one tunnel through filtering enters unit 6, extracts trip/field sync signal, and one the tunnel then enters video sampling circuit (unit 3), obtains digitized video sampling signal; OK/and field sync signal and video sampling signal all import main control singlechip (unit 2), and row/field under the video sampling signal is distinguished by row/field sync signal in unit 2, and further extracts characteristics of image, generates video identification code.
Fig. 3 shows that image recognition code generator of the present invention is made up of three parts: video extraction module, ICSS module, VBI processing module.The video extraction module is responsible for isolating vision signal (VIDEO) from TV AV (Voice ﹠ Video) signal.The ICSS module is that the vision signal that my company's design is produced is handled specialized. circuit modules, and its function is to generate a video identification code (be designated as C0) relevant with this two field picture according to a two field picture, and code length is 16 bits.When vision signal was dynamic image, the ICSS module will constantly be exported the video identification code of dynamic change.The VBI processing module is responsible for video identification code is inserted into the vertical blanking period of television video frequency signal.So, had the video identification code relevant with regard to blanking interval on the scene with every field picture from the TV signal of image recognition code generator output.
Fig. 4 is a TV signal monitoring circuit schematic diagram, each unit title and Action Specification among the figure:
11, radiofrequency signal splitter: effect is TV RF signals is divided into two-way (main line and branch road).
12, radiofrequency signal compound circuit: effect is the merging of two-way radiofrequency signal is superposed to one tunnel radiofrequency signal.
13, double-tone transceiver frequently: effect is to produce and receive double-tone (DTMF) signal frequently in the telephone line, can adopt the MT8880 chip to realize.
14, single-chip microcomputer: effect is to control the double-tone work of transceiver (13) frequently, and the instruction of response central controller (19), can adopt the AT20C51 chip to realize.
15, vertical blanking period sign indicating number detecting circuit: effect is to detect the information code of carrying in the vertical blanking period in the television video frequency signal.
16, ICSS module: effect is according to the video signal generating video identification code.
17, tuner: effect is the vision signal of each channel in the demodulation TV RF signals, can adopt TCL2002MI-2 to realize.
18, Radio Frequency Interfere generator: effect is to produce interference signal at certain channel in the TV RF bandwidth, can adopt the HFS550 chip to realize.
19, central controller: effect is to coordinate to control the work of each unit in the TV signal monitor, can adopt the PIC16F73 chip to realize.
20, rectifier power source: effect is to provide the required power supply in each unit in the TV signal monitor.
The television image monitor is made up of above unit 11～20, and whether be used for monitoring TV signal is legal signal.If there is not video identification code in the vertical blanking period of TV signal, or video identification code and picture material are inconsistent, and TV signal just is considered to illegal so.When finding that there is illegal TV signal in certain channel, the television image monitor will produce interference signal at this channel, makes the TV signal of this channel disturbed, can not normally be received by the user.When illegal TV signal had taken a plurality of channel, the television image monitor can cut off TV signal fully, and illegal TV can not be transmitted.
Its feature is as shown in the figure: TV RF signals enters radiofrequency signal splitter (11), is divided into two-way output, wherein one the tunnel enters tuner (17), and tuner passes through I
2The C bus is subjected to central controller (19) control, each television channel of wheel scan flow, and demodulate television video frequency signal.Television video frequency signal enters ICSS module (16) and vertical blanking period sign indicating number detecting circuit (15) respectively, the ICSS module will produce the video identification code relevant with video image content (being designated as C1), and vertical blanking period sign indicating number detecting circuit then extracts the video identification code C0 that has write at the program transmitting terminal from the vertical blanking period of television video frequency signal.For every field picture, C1 and C0 all send into central controller and compare, if C0 equals C1, illustrate that then receiving terminal has received legal TV signal.If C0 is not equal to C1, perhaps there is not C0 in the vertical blanking period, then central controller passes through I
2The C bus is sent the scrambling instruction to Radio Frequency Interfere generator (18), and the channel that contains illegal TV signal is produced interference signal.Another road TV signal of coming out from radiofrequency signal splitter (11) will with the interference signal back output that blender, superpose.Central controller controls communication module (constituting by 13,14), can pass data mutually with Surveillance center, for example reports to the police, reports current state, accepts Surveillance center's instruction etc.Central controller is also being controlled the radiofrequency signal compound circuit, by transmitting the signal switching command, can turn-off or connect TV RF signals, and when monitoring found that there is illegal TV signal in a plurality of channels, TV RF signals will be turned off.
Fig. 5, Fig. 6, Fig. 7 are the three-view diagrams of TV signal monitor profile.Fig. 8 is the stereogram of TV signal monitor.It is installed in the various components and parts and the circuit chart board of television image associated safety feature in the housing, and lead-in wire connects with relevant circuit.
Superiority of the present invention: be that the characteristic Design that it extracts from television image is ingenious, the video identification code coding rate is fast, realizes simply, and it is invalid to duplicate.Television image associated safety technology has been avoided the drawback of the TV signal authentication technique of common employing again simultaneously.
Embodiment: our suggestion is that a cover TV signal monitor is installed by unit with tens TV user, and for example every building is installed a cover.The TV signal monitor connects supervision center by data link such as telephone wires, TV signal monitor and supervision center can realize two-way communication: tv signal detector regularly sends testing result to supervision center, and for example no abnormality seen, X channel note abnormalities or the like; Supervision center is sent instruction by computer to the TV signal monitor, for example reports the current detection situation, cuts off the X channel, recovers X channel etc.The data-base recording of supervision center the information of local all TV signal monitors, as physical location, addressing numbering, current state etc., information in the database is constantly upgraded according to the data that the TV signal monitor is sent, and can be presented at intuitively on the electronic chart of supervision center in the mode of figure.
Claims (2)
1, a kind of television image associated safety feature is by the video extraction module, ICSS module and VBI processing module connect mutually and are installed in the module casket with the special circuit chip, it is characterized in that, the ICSS module is by main control singlechip (2), video sampling circuit (3), type filter circuit (4), video sound amplifying circuit (5), OK/field sync signal extraction circuit (6) formation, vision signal the need be amplified through unit 5, video letter through amplifying needs through ∏ type filter circuit (4), vision signal through filtering enters unit 6, extract row/field sync signal, enter video sampling circuit (3), obtain digitized video sampling signal; OK/and field sync signal and video sampling signal all import main control singlechip (2), and row/field under the video sampling signal is distinguished by row/field sync signal in unit 2, carries out a step and extracts image and levy, and generates video identification code.
2, the TV RF signals in the television image watch-dog enters radiofrequency signal splitter (11), divides two-way output, wherein one the tunnel enters tuner and passes through I
2The C bus is subjected to central controller (19) control, and television video frequency signal enters ICSS module (16) and vertical blanking period sign indicating number detecting circuit (15) respectively, and the ICSS module will produce and the video image identification sign indicating number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA02146362XA CN1494320A (en) | 2002-10-29 | 2002-10-29 | Television image related safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA02146362XA CN1494320A (en) | 2002-10-29 | 2002-10-29 | Television image related safety device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1494320A true CN1494320A (en) | 2004-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA02146362XA Pending CN1494320A (en) | 2002-10-29 | 2002-10-29 | Television image related safety device |
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| CN (1) | CN1494320A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438628C (en) * | 2006-01-09 | 2008-11-26 | 无锡市吉天通信科技有限公司 | Test recognition and feature data storage method for digital video image |
| CN101707711B (en) * | 2009-11-03 | 2011-10-26 | 上海大学 | Method for detecting tampering of video sequence by Copy-Move based on compressed domain |
| CN104935978A (en) * | 2015-06-29 | 2015-09-23 | 湖南双菱电子科技有限公司 | Cloud-based television coverage detection, analysis and counting system and device |
-
2002
- 2002-10-29 CN CNA02146362XA patent/CN1494320A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438628C (en) * | 2006-01-09 | 2008-11-26 | 无锡市吉天通信科技有限公司 | Test recognition and feature data storage method for digital video image |
| CN101707711B (en) * | 2009-11-03 | 2011-10-26 | 上海大学 | Method for detecting tampering of video sequence by Copy-Move based on compressed domain |
| CN104935978A (en) * | 2015-06-29 | 2015-09-23 | 湖南双菱电子科技有限公司 | Cloud-based television coverage detection, analysis and counting system and device |
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